Question

Un taran vinde in piata o cantitate de struguri. In prima zi , vinde a cincea parte din intreaga cantitate si inca 3000g, a doua zi vinde a saptea parte din restul fructelor si inca 400dag, iar a treia zi vinde ultimele 62 kg. Cate kg de struguri a vandut taranul in cele trei zile?

Answer 1

3000 g=3 kg
400dag=4 kg
/______/_____/_____/______/_______/
/______/.3./
                  /___/___/___/___/___/__/__/ R1(7 parti egale)

                 /___/.4/

                           /____62___________/  R2  62+4=66(6 septimi)

                                                                       66:6=11(1 septime)
                                                                      11x7=77(7 septimi)

                                                                       77+3=80(4 cincimi)
                                                                       80;4=20(1 cincime)
                                                                       20x5=100 kg vandute in cele 3 zile